Steam-boiler furnace.



O. D. ORVIS.

STEAM BOILER FURNACE.

APPLICATION FILED JAN.20.1911.

1,071,787. Patented Sept. 2, 1913.

2 SHEBTS'SHEET 1.

WITNESSES: INI/ENTOR 21. cmm B Orlandll Ora/is A TTOHNE Y8 COLUMBIAPLANOORAPH CO.,WASIIINGTON. n. c.

O. D. ORVIS.

STEAM BOILER FURNACE.

APPLIOATION FILED JAN.20.1911.

Patented Sept. 2, 1913.

2 SHEETS-SHEET 2.

WITNESSES. N;

I FFICE.

ORLANI) I). ORVIS, OF NEW YORK, N. Y.

STEAM-BOILER FURNACE.

T 0 all whom it may concern Be it known that I, ORLAND I). OavIs, acitizen of the United States, residing in the city of New York, boroughof Manhattan, county and State of New York, have invented a certain newand useful Steam- Boiler Furnace, oil which the following is aspecification.

This invention is a steam boiler furnace, the same being adapted, moreparticularly, for water tube boilers.

The invention embodies a plurality of battles supported on thecirculating tubes of the boiler, said ballles lying over the gratechamber and being spaced relative to each other so as to produce anopening for the escape of the products of combustion, and meansindependent of said battles for teeding steam and air directly into thegrate chamber and below the battles therein, the steam and air being fedin thin sheets substantially throughout the area of the grate chamber,whereby the sheets of steam and air are mixed directly with the volatileproducts of combustion tor the purposes, mainly, of consuming the carbonin the smoke and to increase the combustion of the gases arising fromthe bed of fuel resting upon the grate.

In the accompanying drawings, I have illustrated one practicalembodiment of the invention, but the construction shown there in is tobe understood as illustrative, only, and not as defining the limits ofthe invention.

Figure 1 is a vertical longitudinal section partly in elevation. Fig. 2is a plan View, partly in section, on an enlarged scale, the plane ofthe section being indicated by the dotted line 22 of Fig. 1, the blastpipes II I being shown in plan.

In order that others skilled in the art may understand my invention, Ihave illustrated it in connection with an ordinary water tube boiler,wherein A designates the inclined circular tubes, I3 the grate chamberprovided with any suitable grate b, C the front wall provided with fueldoor, 0, and an ash pit door, a, D the bridge wall at the rear of thegrate chamber, E the vertical partitions cooperating with the inclincdtubes, 1* the steam drum and G a suitable outlet for the waste gases andproducts of combustion. All these parts and various other detailsSpecification of Letters Patent.

Application filed January 20, 1911.

Patented Sept. 2, .1913.

Serial No. 603,685.

may be of the usual or any preferred construction.

II designates a horizontal blast pipe which is embedded in front wall,C, of the furnace, said front wall being constructed to provide blastoutlets, it. The blast pipe is provided with a series of nozzles, H,which extend into openings, it, of the front wall for the purpose ofdischarging streams of steam and air directly into the grate chamber.Bridge wall, 1), is constructed to provide a series of blast outlets,(Z, and embedded within said bridge wall is another blast pipe, I, thesame being provided with nozzles, I, which are positioned to dischargestreams of steam and air directly into the grate chamber. Blast pipes,II, I terminate at one end in the valls of the furnace, the other endsof said blast pipes being extended beyond the other side wall of saidfurnace. The extended ends of blast pipes, II, I are provided withfittings, J, J, respectively, each fitting being preferably ot' the formshown more particularly in liig. 2. Attached to each fitting is an airinlet pipe, K, the same extending in any suitable direction with respectto the furnace. Each inlet pipe is attached at one end to a fitting soas to comnumicate therewith, but at the other end of. each air inletpipe is provided a mull'ler, Zr, which may be of any suitableconstruction.

I1 is a steam supply pipe extending outside of the furnace, preferably,between tittings, J, J. Said pipe is provided with nozzles, I1,extending into fittings, J, J, each oi. said nozzles extending acrossthe delivery end of the air inlet pipe, K, which is attached to thefitting, whereby a jet of steam admitted by the nozzle will induce theinflow of air through pipe, K. A feed pipe, M, is connected to pipe, TJintermediate the ends thereof, said supply pipe, L, being provided witha pet cock, m, for the purpose of draining off any water of condensationwhich may :u'ccumulate in pipe, T1, or at the lower part of: pipe, M.Either of the blast pipes, II or I, may be cut out ot use by adjustingone of two valves, m, m said valves being provided in pipe, L, at therespective sides of feed pipe, M. By reterence to Fig. 2 it will be seenthat valve, m, may be operated to drain water of condensation frompipes, L and M. 15y closing valve, or steam will not be admitted toblast r of combustion are free to escape in an upj ward direction so asto substantially envelop pipe, H, and by closing valve m the sup- I. Thedescribed construction 9%, MP, the supply of steam'may be cut offseparately pipes, H, I.

N, O designate battles positioned in the upper part of the gratechamber, B, and above blast pipes, H, I. Each battle is composed,preferably, of fire brick or fire clay tiles resting upon the lowermostrow of tubes, A, of the boiler, but the particular construction of thebattles and the means for supporting the same within the upper part ofthe grate chamber, may be modified as desired by a skilled constructor.For the purpose of economy, however, and for the easy and quickinstallation of the baffles in existing furnaces, itis preferred toemcentrally in the upper part of the grate chamber, whereby the smokeand products tubes and between the partitions, E, E and finally theproducts of combustion will flow in an upward direction and in the rearof the second vertical partition, E, so as to V i with the volatilegases so as to result in a make their escape throughthe outlet, G.

In the operation of the furnace, fuel is supplied to the grate chamberthrough door,

0, and steam is supplied by nozzles, L, to the fittings, J, J,respectively, so that the inflow of steam int-o pipes, H, I will inducethe inflow of air through pipes, K, into said pipes, H, I, respectively.Steam and air are thus supplied to pipes, H, I, and

these pipes operate to distribute air in thin sheets into the gratechamber and below baffles, N, O therein. The nozzles of each blast pipeare so constructed as to spread the streams of steam and air, the streamlssuing from one nozzle being directed toward the right and left, asindi sheet of steam and air over the grate, f).

The sheet of steam and air supplied by blast pipe, H, flows rearwardlyfrom the front wall, C, and into the grate chamber. Con-- from therespective blast l jected into the grate chamber so as to fiow trawise,the sheet of steam and air supplied by blast pipe, I, flows in a forwarddirection-from bridge wall, D, and into the grate chamber, the twosheets of steam and air supplied by pipes, H, I, respectively, flowingin opposite directions into the grate chamber and from walls, C, D,respectively. The two sheets of steam and air are intoward each other,and so that the aggregate area of the two sheets will be equalsubstantially to the area of the grate, whereby the steam and the airwillbe injected into all parts of the volatile products of combustionarising from the grate, so that the steam and air are mixed intimatelywith the volatile products of combustion. The result of such injectionof steam :and air directly into the products of combustion is tothoroughly consume the carbon in the smoke and to increase combustion ofthe gases arising from the fuel. The ascending products of combustionresulting from the mixture of steam and air with the gases and smoke arenot free to escape from all-parts of the grate chamber, but they mustflow below battles, N, O, and finally emerge from the grate chamberthrough outlet, P, the area of which is less than that of the grate andapproximately equal to that of the chimney, thereby accelerating,instead of retarding, the natural draft of the fur-- nace. The currents(superheated steam and heated air) thus injected in the furnace are inthe form of thin sheets, and they move with increased velocity in thechamber, due to expansion of the air and steam within the heated pipesembedded in the furnace walls. The thin sheets or currents of steam andair are in close proximity to the burning fuel, and they becomethoroughly mixed combustion of the, gases which is believed to be asnear to perfect combustionfas is obtainable in furnaces of this type.The area of the outlet, P, being less than that of the grate chamber,the ascending gases mixed with steam and air are baflled to some extentby baffles, N, 0, thus resulting in a circulation within the gratechamber and below the baffles, the effect of which is to thoroughly burnthe gases and consume the carbon in the smoke.

While I have shown the front and bridge walls as provided with the blastpipes, it is evident that said pipes may be installed in the side walls.sir-ed to avail myself of the mere change in the position of the blastpipes, and in the claims I shall refer to said blast pipes as beingpositioned in opposite walls.

Having, thus fully described the invention, what I claim as new anddesire to secure by Letters Patent is 1. In a furnace for water tubeboilers, the

Accordingly, it is decombination of the furnace walls forming a gratechamber, blast pipes in opposite walls of said chamber, battlespositioned in the upper part of the grate chamber, said baf- Hes beingseparated with respect to each other and producing a throatsubstantially centrally of the grate chamber for the free escape of thegaseous products of combustion, and a plurality of series of blastnozzles attached to the blast pipe and with the nozzles of the twoseries positioned to direct steam and air in a common plane, saidnozzles being provided with horizontally positioned flaring outletsoperating to spread the outflowing current of steam and air horizontallyand in thin sheets across the grate chamber and below the battles, saidblast nozzles of one pipe operating to direct one sheet of steam and airin one direction from one wall, and the blast nozzles of the oppositepipe operating to direct another sheet of steam and air in an oppositedirection to the first named sheet, the currents flowing on diverginglines from the nozzles of each series to intersect with each other andthe two oppositely projected sheets of steam and air meeting orintersecting with each other so as to result in an intimate admixture ofthe steam and air with the gaseous products of combustion.

2. In a furnace for water tube boilers, the combination with the furnacewalls forming a grate chamber and nested water tubes extending acrosssaid chamber, of bafiles positioned over the grate chamber and 5 spacedwith respect to each other to pro duce a throat or outlet substantiallycentrally of said chamber, said batlles consisting of firebrick whichare imposed upon, and supported directly by, the lower tier of saidnested water tubes, blast pipes positioned in opposite walls of saidgrate chamber, means for supplying steam and air to said blast pipes,and a plurality of series of blast nozzles attached to said pipes 5 andpositioned in facing relation for discharging steam and air in a commonplane with reference to the grate chamber, said blast nozzles beingprovided with horizontally positioned flaring outlets which op- 5 erateto direct the outflowing currents of steam and air on diverging lines sothat the individual streams will intersect one with the other, the twoseries of nozzles ope ating to project the steam and air in thin sheetsand opposite directions and in intersecting paths so that the aggregatearea of the two sheets of steam and air is equal substantially to thearea of the grate chamber.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ORLAND D. ORVIS.

Witnesses H. I. BERNIIARD, J. F. Mo'rimnsnmAn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissi ner of Patent-:. Washington, D. C."

